grandriver tech

I call the river channel that is the hollow where water flows through the surface of the earth to a river (a matte), the river (I cannot lend it).

In the river channel, there is the case that each action, transportation / the flow of erosion / the earth and sand which I have begun to sharpen of the soil of the water change a position into by a unit by the sedimentation of the earth and sand to a gentle part (more than 100 years) for dozens of years from several years in the natural state not lasting structure. Erosion is remarkable in the peneplain that reached advanced age in particular. River channels usually take the tree-shaped structure not one of them, and it is it from the main stream and the branch. In addition, the river having both lot of branches occasionally has the plural river mouths. Water flowing through the river channel namely the river quantity of water has the case that a change is intense by a season, and there can be the thing that the whole is lost with the thing drifting to the land of the dry climate temporarily. (it dies, river)： wadi)

The source of the river water is raifall such as rain or the snow, but I form wetlands once unless raifall flows into the direct river and form perpetual snow and a glacier of the cold climate, and there is a case I soak into the one end underground, and to flow as subsurface water (free water) and a spring. In addition, in the small river of the scale, the thing which is not fresh water has river water.

The Japanese river touches "a river" after the peculiar name as a general rule, and call it, and there is the thing which I touch "a swamp" in the small river of upper reaches, and is called it. It was often that I guessed the character of "the river" (a matte) right until the beginning in the Meiji era. The Yellow River comes from that a river, Chang Jiang were called Jiang in ancient China, and "river" and "Jiang" of Chinese are touched in a northern river and the southern river each. The character of an old Japanese "river" succeeded this. There is the image of the big river in the character of the river by the present age, and there can be the thing that I add "a river" to the overseas big river for a rhetoric.

I say a source or the source of a river, the nearby river with the source in the place where a river begins to flow through the ground to. Water flows through the place where subsurface water springs out on the ground to the common river throughout the year as the source of a river, but there is the river to drift to temporarily only in wet season on a rainy day and it dies and says this with a river (a wadi, a wadi). The rivers which flowed from the source are put together with many other rivers and finish pouring it into a flow, the sea and the wetlands in low. In that way I call the spot where a river is over the river mouth. I lose water in evaporation and penetration to the basement, and there is the river where water breaks off without making the river mouth. Outwardly when water flows without water in a basement, there is it and says this with an underflow.

I call a river flowing into the wetlands the inflow river of the wetlands. On the contrary, a river flowing out of the wetlands is an outflow river. There is a case considered wetlands compare it with a river, and to have got in small in the middle of a river, and there does not need to be the thing calling an inflow spot to wetlands with Kawaguchi in that case. There are many these in the case of a dam lake.

Seeing from a certain spot, I say to upper part of a river, Kawaguchi in near with the lower part of a river in that is near to the source. The direction that water flows through flows Kawakami, and a last direction is the lower part of a river. I can assume the upper reaches, the lower part of a river the down stream again over a river. I assume the whole of the river and halve it with the upper reaches, the down stream, and there can be the upper reaches, midstream, the down stream and the thing dividing it into three. The upper reaches can distribute a mountainous district, the down stream from low land and the topography. The intense river level of the step of the upper basin is called a mountain stream.

Seeing from a certain spot, I say to upper part of a river, Kawaguchi in near with the lower part of a river in that is near to the source. The direction that water flows through flows Kawakami, and a last direction is the lower part of a river. I can assume the upper reaches, the lower part of a river the down stream again over a river. I assume the whole of the river and halve it with the upper reaches, the down stream, and there can be the upper reaches, midstream, the down stream and the thing dividing it into three. The upper reaches can distribute a mountainous district, the down stream from low land and the topography. The intense river level of the step of the upper basin is called a mountain stream.

I join many other rivers, and the river grows big as I go downstream. Among joining rivers, I do a long thing with main stream or Motokawa more greatly. It is with main stream / Motokawa then, and a thing of a potato is called branch or. Streamflow can be divided into a plural number from a certain spot and calls the main stream, Motokawa, the thing which are not so with this case, a big thing with an arm of a river or a group river. The main stream, a branch, an arm of a river are general words, and Motokawa, the group River are terms of the government office.